View of part of the Holly Group, North American Indian (Ancestral Puebloan) archaeological sites, at Hovenweep National Monument in Holly Canyon, Colorado. Shows partly restored stone masonry and mud dwellings built on large boulders. One structure...

Bird's eye view of early Cripple Creek, Colorado (Fremont prior to incorporation); scene includes one and two-story log and wooden frame flat and gable roof buildings and numerous canvas tents scattered throughout town and on hillsides; identified...

Studio portrait of Mrs. George L. Sites (Sarah F.), a resident of Georgetown (Clear Creek County) and later Denver, Colorado. Her husband was a miner and contractor. Her dark hair has gray steaks on the sides, she wears it up and pulled back. She...

View of a Native American multi-story structures of the Towa pueblo and Spanish mission ruins of San Jose de los Jemez church at the historic Giusewa Pueblo, near Jemez, New Mexico. Men and women stand and pose on ruins or sit on boulders near a...

A Native American (tribe unknown) man sits in a large door opening, on an Anasazi talus dwelling, Puye Cliff Dwellings, Santa Clara Pueblo, New Mexico. The tuff dwelling has holes for vigas. The man wears suspenders and a hair pipe choker.

Large stone slabs, still somewhat covered with dirt, line the ground of one of the excavation sites at Hawikuh in New Mexico. The dirt wall of a ditch is in the background. The top ledge of the ditch is lined with shrubs and additional rocks.

View of Native American (Jemez) Spanish mission ruins of San Jose de los Jemez church at the historic Giusewa Pueblo, near Jemez, New Mexico. Hillsides, trees, bushes and probably cholla cacti are near masonry ruins.

View over the ancient Native American (Tewa) ruins of Community House on the mesa top, Puye Cliff Dwellings National Landmark, Santa Clara Pueblo, New Mexico. Rio Grande valley scenery shows in distance.

View over the ancient Native American (Tewa) masonry tuff block walls ruins of Community House on a mesa top, Puye Cliff Dwellings National Landmark, Santa Clara Pueblo, New Mexico. A man and the Rio Grande valley scenery shows in distance.

View of a Native American (Tewa) Pueblo woman showing her pottery to visitors at the Puye Cliff Dwellings National Landmark, Santa Clara Pueblo, New Mexico. The volcanic tuff cliff side shows in background.

View of the Long House, Native American (Anasazi) talus dwellings at Puye Cliff Dwellings, Santa Clara Pueblo, New Mexico. Three wooden ladders rest against the tuff dwellings; holes for vigas are visible.

Two men stand above the excavation site of Pithouses A, B and C in Step House, a cliff dwelling in Mesa Verde National Park. Dirt has been removed from the round sites underneath a large rock overhang. Digging tools and boxes lie scattered around...

Man sits in a window opening of a Native American (Tewa) talus dwelling at the Puye Cliff Dwellings, Santa Clara Pueblo, New Mexico. The talus dwellings have holes for vigas and petroglyphs on the exterior wall.

Studio portrait of George L. Sites, a miner in Georgetown (Clear Creek County), Colorado. (He later worked as a stone contractor in Denver). He wears a jacket, a shirt with an upright collar and a tie. He has a gray, full, trimmed beard and has...

View of Native American (Anasazi) mud and stone ruins at Hovenweep National Monument, Motezuma County, Colorado. One group of three cylindrical ruins stands on two rocks which project up from a rocky hill. One of the ruins has a door opening....

View of Native American (Anasazi) talus dwellings on Pajarito Plateau, Pajarito Park (Bandelier National Monument), New Mexico. The talus dwellings have large door openings and holes for vigas. Trees and bushes stand near the bottom of the tuff...

View of Tsankawi, Native American (Anasazi) mesa-top pueblo ruins at Bandelier National Monument, New Mexico. The stone masonry ruins stand on a rocky desert landscape. The mesas of the Pajarito Plateau and mountains stand in the distance.

Two men stand in a Native American (Anasazi) cliff dwelling known as Sandal House in Mancos Canyon, Mesa Verde National Park, Colorado. Shows ruins including a circular stone masonry kiva under a natural rock overhang.

View of mine buildings and tailing sites on Farncomb Hill near Breckenridge (Summit County), Colorado. Mines and workings are identified as Dogtown on Dry Gulch, the Wapiti group, the Boss and Key West workings, the Ontario. Shows Georgia Gulch,...